| commit | d9b55eeb1d55ef2dc5a4fdbff9604c2c68cb5649 | |
| author | Tejun Heo <tj@kernel.org> | |
| Tue, 24 Feb 2009 02:57:21 +0000 (24 11:57 +0900) | ||
| committer | Tejun Heo <tj@kernel.org> | |
| Tue, 24 Feb 2009 02:57:21 +0000 (24 11:57 +0900) | ||
| tree | 1f81884066512810be81731a76fb5e041ac62c22 | treesnapshot (tar.gz zip) |
| parent | 458a3e644c3327be529393982e24277eda8f1ac7 | commitdiff |
percpu: remove unit_size power-of-2 restriction
Impact: allow unit_size to be arbitrary multiple of PAGE_SIZE
In dynamic percpu allocator, there is no reason the unit size should
be power of two. Remove the restriction.
As non-power-of-two unit size means that empty chunks fall into the
same slot index as lightly occupied chunks which is bad for reclaming.
Reserve an extra slot for empty chunks.
Signed-off-by: Tejun Heo <tj@kernel.org>
Impact: allow unit_size to be arbitrary multiple of PAGE_SIZE
In dynamic percpu allocator, there is no reason the unit size should
be power of two. Remove the restriction.
As non-power-of-two unit size means that empty chunks fall into the
same slot index as lightly occupied chunks which is bad for reclaming.
Reserve an extra slot for empty chunks.
Signed-off-by: Tejun Heo <tj@kernel.org>
| mm/percpu.c | diffblobblamehistory |